The PRIMO technique developed by Alveole allows you to print multiple proteins in 2D and 3D at high resolution and in different gradients.

The technology is based on LIMAP* technology (Light Induced Molecular Adsorption of Proteins) and combines a maskless and contactless photolithography system (PRIMO) controlled by a dedicated software (named “Leonardo”) and a specific photoactivatable reagent(PLPP). The combined action of UV and PLPP makes it possible to generate, in only a few seconds, any multi-protein pattern on standard cell culture substrates.

Source and more information: http://www.alveolelab.com/our-products/primo-micropatterning/